Mirion Technologies GEM-5 User Manual

Chapter 5 Parameters Definition
130
Function keys F1 through F11 (with the exception of F6 and F7 which are already in
use and active) become active and their function is shown on the screen only when
the corresponding value specified for the group (i.e. on this screen) is different from
the current value in effect for at least one of the individual zones in the group. A
message is displayed on the screen to serve as a reminder that individual zone
value(s) differ from the current common value. The corresponding function key (F1
to F11 with the exception of F6 and F7, which are already in use) can be used to
update all single detection zones in the group. Use Shift+F1 to Shift+F11 (with the
exception of Shift-F6 and Shift-F7 which are not available here) to update all sum
zones in the group.
Note: Failing to press F1, F3, F4, F5, F8, F9, F10 and F11 (or Shift+F1, etc.) after
editing the corresponding line item results in no change being made to the
corresponding parameter setting for any detection zone in the group.
However the new settings will be displayed the next time the F5 – Group
Settings screen is opened along with the reminder to update individual zone
settings.
Note: Use this function carefully since F5 – Group Settings will override the
individual settings of detectors are intended to have their own settings.
Line Items
Alarm Activity (or Alarm Emission Rate): See the F2 – (Zone) Settings screen on
page 116.
Cold Alarm Activity: See the F2 – (Zone) Settings screen on page 116. The
maximum is 3.402823466E+38 (regardless of the activity units).
High Alarm Activity (or High Alarm Emission Rate): See the F2 – (Zone)
Settings screen on page 116. This can be set to a fixed value (10 cps - 16600 cps).
Alarm Test Source: This is the same item as described in F2 – (Zone) Settings
screen on page 116.
The Source Activity, Date, and Dimension are automatically filled in based on the
Source.
High Background Rate
7
: See the F2 – (Zone) Settings screen on page 116. This can
be set to a fixed value (10 cps – 16600 cps). The factory default is 1800 cps for large
Gamma detectors.
Excessive Background Rate
7
: See the F2 – (Zone) Settings screen on page 116. This
item is set to a fixed value (10 cps – 16600 cps, default 15000 cps).
Low Background Rate
7
: See the F2 – (Zone) Settings screen on page 116.
Calibration Source: See the F3 – Calibration screen on page 92.
7
High Background Rate, Excessive Background Rate, and Low Background Rate settings are applied to single detection
zones only, not sum zones.

Mirion Technologies GEM-5 Specifications

General

Brand	Mirion Technologies
Model	GEM-5
Category	Monitor
Language	English